These systems provide 0.280 K
temperatures, with the sample either immersed in the liquid He-3, or on a cold
finger in vacuum (or UHV). They are available with optical access into the
high field and low temperature region, with optional vacuum load locks that
enable sample exchange without disrupting the main dewar and magnet.
Schematics of standard sample in vacuum (HE-3-SSV) and top loading sample in
liquid (HE-3-TLSL) systems are shown, with hold times ranging from a few hours
to several days. The field direction, magnitude and uniformity need to be
specified, as well as the sample space required. These systems include
thermometry at the 1 K condensing pot, the internal He-3 charcoal pump and the
low temperature sample stage. You can also see more detailed models for He-3
cryostats in the ultra low temperature brochure or our web site (http://www.janis.com/p-3he.html). These systems are available with a
rotating sample holder that changes the angle between the plane of the sample and the magnetic field direction.